Loose-leaf binder.



PATENTED MAY 14, 1907.

J. SOHADE, JB. LOOSE LEAF BINDER. APPLIQATION FILED FEB/23. 1906,

st: 4 fi ag lnventor @afif PATENT OFFICE.

JOHN SCHADE, JR, OF NEW YORK, N. Y.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented May 14, 1907.

Application filed February 23. 1906. Serial No. 302,329.

To all whont it may concern:

Be it known that I, JOHN SOHADE, Jr., a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Loose-Leaf Binders, of Which the following is a specification.

This invention relates to improvements in loose leaf binders, and the object of my invention is to provide a new and improved binder of this kind. which is simple in construction, strong and durable, can easily be opened and closed and is absolutely reliable and secure in holding any number of loose leaves in place.

In the accompanying drawings, in which like letters of reference indicate like parts in all the figures:Figure 1 is a perspective view partly in section, showing my improved loose leaf binder. .Fig. 2 is a plan view of one of the backs, parts being broken away. Fig. 3 is a vertical transverse sectional view through the binder showing a modified form of back in cross section.

The loose leaves A are provided near the rear edge with two or more holes for receiving binding osts or pins B by which said leaves are hel d between the two covers G and C To the bottom cover a tubular metal strip D commonly known as a back is secured, as shown in Fig. 1, and in said back D the binding posts or pins B are firmly secured. A similar hollow back D is secured on the upper surface of the upper cover C and this upper back D is provided with openings E in its top and bottom, through which openings the binding posts or pins B pass, and project from the topof this upper back a greater or less distance according to the length of the binding posts or pins, and the number of sheets or leaves between the covers, it being understood that those binding posts or pins are of the conventional type and can be lengthened or shortened according -to the number of sheets or leaves held or to be held between the covers. The covers are also preferably united by means of a flexible back F in the conventional manner. The backs D and D may be composed of a flattened seamless metal tubing as for example shown in Fig. 1, but I prefer to make them of a strip of sheet metal which is bent to form the top layer a, the bottom layer 1), parallel with the top layer, the closed side edge (1 formed by the metal uniting the top and bottom. To

close the other side of this back the layer 6 is curved upward and inward and the layer f is curved and rolled over this layer 6 and by suitable mechanism the two parts or layers 6 and f are pressed firmly upon each other whereby a stiff and at the same time light back is formed out of a strip of plain sheet metal.

A shaft G is mounted to turn in the back D and is confined between the pins B and the closed side edge (1 of the back D, the said curved side edge being preferably curved. on such a radius as to'conform to the curvature of the circumference of the shaft G. To prevent the shaft from slipping out of the back lengthwise it is provided with an annular groove or recess G into which a pin H extends which is secured in the back D thus permitting the shaft G to turn axially and to move slightly lengthwise to properly adjust itself, but still preventing the shaft from dropping or sliding out of the back D. The shaft G is provided at one end of the back D with a tooth or projection J for receiving a key by means of which the shaft G can be turned axially. At each post or pin B the shaft G is provided with a spiral groove, that is to say, a groove K cut in the circumference of the shaft at an incline or on the lines of a spiral and in such a manner that the two spirals are convergent or are both inclined from the ends of the shaft toward the center.

If, after the leaves have been inserted and the pins or posts B passed through the apertures in the top back D, the shaft G is turned axially by means of a key applied on one end and as the edges of the spiral 'rooves K act on the posts B, the posts B are forced slightly from each other and are pressed firmly against the edges of the openings E in the upper back D and are thus jammed so tightly and firmly against the edges of the holes as to hold and lock the posts and the upper back D firmly together, and in place. To unlock the posts it is only necessary to turn the shaft G slightly in the reverse direction as thereby the lateral pressure is removed from the posts and they can be easily withdrawn. It will be noted that the pressure on the posts B is in the direction of the length of the shaft G and in this direction only and that the posts are pressed against the edges of the holes E in the direction of the length of the back only.

Having described my invention what I claim as new and desirqto secure by Letters Patent is 1. In a loose leaf binder, the combination with two backs, posts securely fastened in one of the backs and passing freely into the other back and a shaft mounted in this latter back to rotate axially and to have longitudinal movement, and having spiral grooves for locking said back to the posts, substantially as set forth.

2. In a loose le'af binder, the combination with two backs, of posts secured in one back and passing freely through holes of the other back, a shaft mounted to turn axially and move longitudinally in that back through which the posts pass loosely, said shaft having spiral grooves through which said posts pass, substantially as set forth.

3. In a loose leaf binder, the combination with two backs, of posts secured in one back and passing freely through holes in the other back, a shaft mounted to turn axially and move longitudinally in that back through which the posts pass loosely, said shaft having spiral grooves therein, through which grooves said posts pass, the grooves being inclined in the direction from the two ends of the shaft toward the center, substantially as set forth.

4. In a loose leaf binder, the combination of two backs, posts securely fastened in one back and passing freely through the other, a shaft mounted to revolve on the latter back having spiral grooves therein into which the said posts engage and a straight groove into which a retaining pin is inserted, said groove being wide enough to admit of slight longitudinal movement, thereby causing the binder to lock with an equal pressure on both posts, substantially as set forth.

5. In a loose leaf hinder, the combination. with two backs,ofposts secured in. the one back and passing freely through holes in the other back, a shaft mounted to rotate axially and move longitudinally in that back through which the posts pass loosely, said shaft having spiral grooves through which the posts pass, and said shaft also having a circumferential groove and a pin passing from the back into said circumferential groove, the width of the groove being greater than that of the pin so as to permit of longitmlinal movement of the shaft in the hack, substantially as set forth.

6. In a loose leaf binder, a hollow metal back formed of a strip of sheet metal bent to form a top and. bottom and side, each of a single thickness and the opposite side formed. of a double thickness of metal, the two thicknesses being lapped and pressed together, substantially as set forth Signed at New York city in the county of New York and State of New York this 13th day of Feb. A. D. 1906.

JOHN SCHADE, JR.

Witnesses:

ERNEST B. FAIINESTOCK, JonN SCHADE. 

